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KengaRu [80]
3 years ago
6

A researcher wants to test if there is a significance difference between the BMI of regular sugary beverage drinkers in 2010 (me

an BMI = 26.5, reported by the National Health Survey, regular sugary beverage drinker defined as at least 1 sugary beverage drink daily) and in 2015. In December of 2015, the researcher collected a sample of 114 regular sugary beverage drinkers, she measured their BMls and found that the average BMI was 29 with a standard deviation of 3.
1. Which one of the following conclusions is INCORRECT?
a. After conducting the hypothesis testing procedure, the conclusion should be to accept (or fail to reject) the null hypothesis.
b. The critical test statisticis is t = 1.960.
c. The obtained test statistic is t = 8.898.
d. The null hypothesis is that the BMI of regular sugary beverage drinkers in 2010 does not differ from that in 2015.
Mathematics
1 answer:
Svetach [21]3 years ago
8 0
I think it is A hope this helps:)
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Westkost [7]

Answer: x = 0 or x = 2

Step-by-step explanation:

To solve this, we must note that the two equations speaks of a single function of y. So

y = 2x - 3 = x² - 3

So from.here we can equate the two together and solve for x.

x² - 3 = 2x - 3, biw convert to a quadratic expression

x² - 2x - 3 + 3 = 0

x² - 2x = 0

Now factorize

x( x - 2 ) = 0, so solving for x

x = 0 or x = 2. .I believed getting the 2 won't be a problem

When x - 2 = 0

Then x = 2.

5 0
3 years ago
Find the length of side s to the nearest tenth.
stepladder [879]

Answer:

10.3

Step-by-step explanation:

So first you get the angle of T which is 25 degrees

The you use the law of sine

\frac{s}{Sin 119} =\frac{5}{Sin 25}

Then you get s = 10.34763268

Round to nearest tenth

s = 10.3

8 0
2 years ago
List the key parts of this graph and explain what each means in a real world context
Reptile [31]

Which graph? I can not see any graph in there

3 0
2 years ago
What is the distance between the two points (-8,-6) and (-2,4)?
MAVERICK [17]

Answer:

\sqrt{136} = 11.66 units

Step-by-step explanation:

distance between 2 points (a,b) and (c,d) = \sqrt{(a^{2}-c^{2} ) +(b^{2}-d^{2} ) }

= \sqrt{((-8)^{2}-(-2)^{2} ) + ((-6)^{2}-4^{2})   }

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6 0
3 years ago
A playground is in the shape of a square with each side equal to 109 yards. It has skating rinks in the shape of the quadrants o
I am Lyosha [343]

Answer:

radius = 30 yd , cost of cement = $7065

Step-by-step explanation:

First we will find the area of the circular sectors. From that we can find the cost of cement and their radius.

The area of the playground is ...

playground area = (109 yd)^2 = 11,881 yd^2

Then the area of the skating rinks is:

rink area = playground area - remaining field

rink area = 11,881 yd^2 - 9,055 yd^2 = 2,826 yd^2

Then the cost of cement for the rink area is ...

(2826 yd^2)($2.50 yd^2) = $7065

The four quarter-circle skating rinks add to a total area of a full circle. That area is given by ...

A = πr^2

Put the values in the formula:

2826 = 3.14r^2

Divide both sides by 3.14

900 = r^2

By taking square root at both sides we get,

30 = r

The radius of each quadrant is 30 yards....

6 0
3 years ago
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